[benjymo]

Do people in the US really drive to through the country that often? I guess people drive maybe 2000-3000 km a year for holidays, e.g. to skiing resorts in winter or to Italy in summer, but even that isn't average.

I'd say most of the drives are commutes to work and shopping.

[natefinch]

When everything is twice as far away, it adds up. My wife and I work from home and we still manage 10,000 miles a year on the car. That's driving kids to school (just a couple miles each way), going grocery shopping (10 miles each way), driving kids to swim lessons (10 miles each way), going to grandma's house (120 miles each way), our one vacation (150 miles each way)

There's also zero useful public transportation for us. If I worked in the city, I could take the train, but it's 4 miles to the train station.

[archi42]

I wouldn't claim knowledge; it's only an abstraction from local low density areas: Where I live people drive less (suburbia) than where I was raised (country side) because there's practically no point in driving 30km/19mi to do groceries if that could be done in town.

Now Germany has a population density of 621 people/mi². The US has a little less than 100. Assuming similar interconnectness (family, friends, jobs, holidays), travel distances are much larger.